Alloy



U ITED STATES PATENT OFFICEO DANIEL OHARA, DANIEL W. ELDR-EDGE, AND JOHN LOGAN, OF WALTHAM,

' MASSACHUSETTS. I

ALLOY. v 1

SPECIFICATION forming part of LettersxPatent No. 385,950, dated July 10, 1888.

Applicntion filed March 2. 1888. Serial No. 265.930. (No specimens.)

To all (.UhU/Ib it may concern.- portionsof platinum, copper, and nickel above Beitknown that we, DANI1-1LOHARA,DAN- specified. hnt mny vary the sumo-within rea; I

IEL W. ELDREDGE, and J on: LOGAN, of Walsonablelimitsug ithoutdeparting from the spirit them, in the county of Mitltllesex and State of of our invention. 25 5 Massachusetts, have invented certain new and \V e claimuseful Improvements in Alloys, of which'the An alloy or compound metal composed of following is a specification. platinum, coppen nickel, and gold,in substan- -Onr invention has foritsobjecttoprovide an tiailly the following parts, viz: sixty parts of nlloyor compound metal which shall be praetiplatinum, twenty -fonr parts of copper, ten 3c cnlly nonmagnetic, inoxidiznhle, endwillhave parts of niekel,'a nd from-five to twenty parts nsnitnblc coellicientofexpunsion to adaptit for of gold, as set forth.

use as the nmteiial for one of the parts of the In testimony whereof we have signed our rim of a compensulion-balance for watches or names to this specification, in the presence of chrononmters. two subscribing witnesses, this 28th dayof Feb- 35 [5 Our improved alloy qionsists ofacompound ruery, A. I). 1888.

of platinum, copper, nickel, itnd gold. in about DANIEL QHARA. the following" proportions: vplatinum, sixty DANIEL 'W. ELDREDGE. ((30) parts; coppc1,,t\vcnty -fonr (2-1) parts; JOHN LOGAN.

nickel, ten (10) parts; gold, from live (5) to \Vitnesscsr 2o twenty (20) parts. V HENRY N. FISHER,

We do not limit ourselves to the exact pro- EDWARD A. MARSH. 

